As a new owner of an already not stock/correct 1972 02, I'm very interested in improving the power of this car. It already has been rebuilt, bored to a 2.1 L and a weber carb. It also, has a 5 speed. Will the S14 motor(which I'll probably not find or afford)bolt up to this tranny and would an M42 or 44 bolt up to it(1.8 or 1.9 DOHC). Or can I can get at least another 50 h.p. out of the M10 motor without spending a fortune and still have a reliable driver. I also want to put in after market a.c., any advice and where to shop and any good sources for 02 parts? Hoping some of you experienced 02 guys will steer me in the right direction.